What are the zeros of the function

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Which graph represents the linear function below? y-3=1/2(x+2)

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad